The present disclosure relates generally to treatment reservoirs (155, 250, 260, 370) for delivering treatment compounds to an aquatic environment and systems configured for controlled release of a treatment compound in an aquatic environment. The present disclosure provides a treatment reservoir including a treatment compound and a delivery apparatus configured to release the treatment compound according to a desired release profile. The delivery apparatus may include a release media operatively associated with the treatment compound such that the release media is configured to release the treatment compound to the aquatic environment according to the desired release profile. The present disclosure further provides containment pens (115) and containment systems for containing aquatic organisms in an aquatic environment including at least one treatment reservoir including a treatment compound and a delivery apparatus operatively associated with the treatment compound to release the treatment compound to the aquatic environment according to a desired release profile.
